In:
Science, American Association for the Advancement of Science (AAAS), Vol. 365, No. 6452 ( 2019-08-02), p. 495-498
Abstract:
Thermoelectric materials have a large Peltier effect, making them attractive for solid-state cooling applications. Bismuth telluride (Bi 2 Te 3 )–based alloys have remained the state-of-the-art room-temperature materials for many decades. However, cost partially limited wider use of thermoelectric cooling devices because of the large amounts of expensive tellurium required. We report n-type magnesium bismuthide (Mg 3 Bi 2 )–based materials with a peak figure of merit ( ZT ) of ~0.9 at 350 kelvin, which is comparable to the commercial bismuth telluride selenide (Bi 2 Te 3– x Se x ) but much cheaper. A cooling device made of our material and p-type bismuth antimony telluride (Bi 0.5 Sb 1.5 Te 3 ) has produced a large temperature difference of ~91 kelvin at the hot-side temperature of 350 kelvin. n-type Mg 3 Bi 2 -based materials are promising for thermoelectric cooling applications.
Type of Medium:
Online Resource
ISSN:
0036-8075
,
1095-9203
DOI:
10.1126/science.aax7792
Language:
English
Publisher:
American Association for the Advancement of Science (AAAS)
Publication Date:
2019
detail.hit.zdb_id:
128410-1
detail.hit.zdb_id:
2066996-3
detail.hit.zdb_id:
2060783-0
SSG:
11
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